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【单选题】
国产石油钻机多采用（）。A.
套筒滚子链条
B.
齿形链条
C.
链条
D.
针形链条
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【简答题】请选出问句的合适答语 ( ) 1. Where are you from? ( ) 2. What's this? ( ) 3. Is the Queen's house big? A. I'm from China. B. It's a pen. C. Yes, it is．
【简答题】The Queen’s English is now sounding less upper-class, a scientific study of the Queen’s Christmas broadcasts had found. Researchers have studied each of her messages to the Commonwealth countries sinc...
【单选题】下列哪种行为在我国不能申请或重新申请车辆驾驶证。
A.
有过醉酒驾驶经历的。
B.
在公安机关有吸毒行为记录或解除强制隔离戒毒措施不满三年的。
C.
为吸毒人员提供吸毒场所及吸毒工具的
D.
种植过罂粟或大麻的。
【单选题】关于相位差的说法不正确的是( )。
A.
相位差是同频率正弦量的相位角之差
B.
相位差是同频率正弦量的初相角之差
C.
两个同频率的正弦量之间的相位差为常数，与计时的选择起点有关
D.
同频率的正弦量之间计算相位差时，其超前和滞后的角度不能大于 180 °
【单选题】What does the writer think of the interior and exterior of Queen Anne's Mansions?
A.
They were elegantly decorated both inside and outside.
B.
They were grim from the outside and had a modest decor inside.
C.
They were flashy from the street but nondescript. inside.
D.
They were plain outside but with lavish interiors.
【单选题】《危险货物分类和品名编号》（GB6944-2012）中Ⅱ类气体中的易燃气体，是指温度在20℃、标准大气压101.3kPa时，爆炸下限≤13%，或燃烧范围不小于（）的气体。
A.
10个百分点
B.
12个百分点
C.
13个百分点
D.
20个百分点
【单选题】What kind of title will be granted to the Queen's eldest son in the UK from the day he is born?
A.
The Prince of Edinburgh.
B.
The Duke of Edinburgh.
C.
The Prince of the United Kingdom
D.
The Prince of Wales.
【单选题】What's the topic about the Queen's broadcast?
A.
On War
B.
On Coronavirus
C.
On her family
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